Telephonic apparatus.



No. 660,572. Patented Oct. 30, I900.

R. GUNTHER.

TELEPHONIC APPARATUS.

(Application filed Nov. 18, 1898.)

(Nb Model.) 2 Sheets--Sheei I;

m2 uouam PETERS ca, Pamaumm msmwmom A: c.

Patented 0m. 30; I900. R. GUNTHER. TE-LEPHONIC APPARATUS.

(Application filed Nov. 18, L898.)

2 Sheets-Sheet 2.

(No Modal.)

N \NRu 0 a 4 UNITED STATES PATENT Orrics.

RAIlVIUND GUNTI-IER, OF VIENNA, AUSTRIA-HUNGARY.

TELEPHONIC APPARATUS.

SPECIFICATION fOImiJIQ part of Letters Patent No. 660.572, dated October30, 1900.

Application filed November 18, 1898. Serial No. 696,820. tNo model.

To all whont it may concern:

Be it known that 1, RAIMUND GiINTHER, a subject of the Emperor ofAustria-Hungary, residing at Vienna, in the Province of Lower Austria,in the Empire of Austria-Hungary, have invented certain new and usefulImprovements in 'lelephonic Apparatus; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters of reference marked thereon,whichformapartofthisspecification.

Myinvention has relation to telephony; and it has for its objectt-heprovision of means at a subscribers station whereby a message ormessages sent from any other station to said su bscribers station may,in the absence of the subscriber, be received and regggtj gd forreproduction. To this end I provide at the subscrio'erss'tation aninstrument capable of recording and reproducing a message or messagessent to said station during the absence of the subscriber, as agraphophone or other like instrument, a motor for driving therecording-cylinder of said instrument, of any well-known construction,as a train of clockgearing, an electrically-controlled starting andstopping device for said motor, an electromagnet for transmittingelectric impulses corresponding to sound to the diaphragm of thegraphophone which carries the recordingstyle, and a local sh nut-circuitincluding the said electromagnet and the electrical appliancescontrolling the starting and stopping devicesforthegraphophone-motor,and means for closing said sh unt-circuit intothe call and telephonic circuit and for cutting the callbelland receiverout of the latter circuit; but

that my invention may be fully understood- I will describe the same indetail, reference being had to the accompanying drawings, in which-Figure 1 is a side elevation, Fig. 2 a plan view, and Fig. 3 an endelevation, of the starting and stopping mechanism of thegraphophone-motor; and Fig. 4 is a diagrammatic view of so much of atelephone installation as will be necessary to an understanding of myinvention, showing at one station only a spring-operated motor foractuating the phonogram-blank and the switch for directing currenteither to the telephone or the recording-circuit.

Referring to Fig. 4, S and 8* indicate the telephoneinstruments at twosubscribers stations; 0 a, the main line connecting said stations; 8,the switch at station S, controlling the call and telephone circuits;and O, a local shunt-circuitadapted to be included in the calland-telephone circuit through the switch 3, said shunt-circuit includingan electromagnet- M, which operates the starting and stopping mechanismfor the telephone-motor, and an electromagnet N for transmittingtelephonic impulses to the diaphragm that carries the recording-style ofthe phonograph.

Should it become necessary forthe person at stat-ion S to absenthimself, he simply manipulates the switch .5- so as to cut the call andreceiver circuits out of the main line and connect the shunt-circuit O Owith said main line, so that on calling the electromagnets M and N willbe energized, the starting device actuated, the motor U for" thephonographcylinder started, and the phonograph placed in condition toreceive and record the message transmitted. When thisisdoneandstation Scalled off in the usual manner, the electromagnets will be deinagnetizedand the motor for the graphophotie-cylinder stopped, as hereinafterexplained. On the return of the subscriber he can then switch theshuntcircuit out of the main line and switch the call and receivercircuit back into said main line and have the recorded messagereproduced in a well-known inanner,the electromagnet N being of coursefirstremoved.

For starting and stopping the motor for the record-cylinder of thegraphophone I provide a stop device normally in engagement with anoperative element of the motor and a device for controlling theoperation of said stop the magnetic field.

It wi 11 readily be understood that when the electromagnet M isenergized and the armature A is attracted the pawl-arm 0 will cause theWheels Rand r to revolve a distance equal to that between two teeth onWheel R; but inasmuch as the wheel 1' has only half as many teeth as thewheel R and in view of the fact that the arrangement of the teeth onboth wheels is such that those on wheel R lead or are in advance of theteeth on wheel r the fly WV will be released and the motor started.Then, on the contrary, the electromagnet M is demagnetized, the armatureA. and its lever a will be'retracted by a spring f, the paWl-armc ridingback on Wheel R to engage the next tooth thereon, so that when theelectromagnet is again energized and demagnetized by the closure andsubsequen t interruption of the main-line circuit in calling off asusual said armature-lever will first be attracted, therebyim partinganother partial revolution to wheels Rand r, whereby a tooth of thelatter is moved into the path of the fly W and the motor stopped,thearmature-lever being next retracted to a position to again impart apartial rotation to wheels R and r, and thereby release the fly W on thenext closure of the main-line circuit.

As is the practice in telephones, I mayarrange a metallic diaphragm Binfront of the pole of the electromagnet N and connect said diaphragm withthe diaphragm D that carries the phonograph-style, and thus transmit thecurrent impulses to the last-named diaphragm, which will be of advantagein longdistance telephones where direct transmission becomes more orless difficult, and the weakening of the vibrations of the diaphragmresulting from this arrangement may be avoided by the interposition of asound-strengthener of any well-known description, as is the commonpractice.

As the phonograph and its spring-actuated motor may be of any well-knownor usual construction I have deemed it unnecessary to illustrate thesame.

I am aware that phonographs have before my invention been used to recordtelephonemessages either at one or. both ends of the line for thepurpose of obtaining automatically a record of the messages transmitted.My invention, however, does not lie broadly in means for obtaining aphonographic record of telephone-messages, but in the means forobtaining a record of such messages automatically without theintervention of a person at the receiving-station or, in other words,during the absence of an attendant at the receiving-station.

Havingth us described my invention, what I claim as new therein, anddesire to secureby Letters Patent, is- Y 1. In a telephone-circuit, thecombination with the receiver, transmitter and signaling device, of anauxiliary circuit, a switch for connecting the auxiliary circuit to lineand siin ultaneously disconnecting the subscribers station and signalingdevice, electromagnetic devices in parallel in said auxiliary circuit,

one of said devices arranged to operate a phonographic recorder and theother organized to set in motion means for driving the phonogram-blank,substantially as and for the purpose set forth.

2. In a telephone-circuit, the combination with the receiver,transmitter and signaling device; of an auxiliary circuit, a switch forconnecting the auxiliary circuit to line and simultaneouslydisconnecting the subscribers station and signaling device,electromagnetic devices in parallel in said auxiliary circuit, one ofsaid devices arranged to operate a phonographic recorder and the otherorganized to operate an armature for setting in motion and stopping asuitable motor for driving the phonogram-blank, said device respondingonly to signal-current impulses,substantially as and for the purpose setforth.

In testimony that Iclaim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

RAIMUND GUNTHER.

WVitnesses:

ALVESTO S. HOGUE, AUeUsT FUGGERJ

